[linux-devkit]:~/tmp/GIT_LWIP/lwip-contrib/ports/unix/proj/unixsim> ./simhost -d
System initialized.
netif: netmask of interface  set to 255.255.255.255
netif: GW address of interface  set to 0.0.0.0
netif: IP address of interface  set to 0.0.0.0
netif: added interface pp IP addr 0.0.0.0 netmask 255.255.255.255 gw 0.0.0.0
ppp phase changed[0]: phase=0
ppp_connect[0]: holdoff=0
ppp phase changed[0]: phase=1
pppos_connect: unit 0: connecting
ppp_start[0]
pppos_send_config[0]: out_accm=FF FF FF FF
ppp_send_config[0]
pppos_recv_config[0]: in_accm=FF FF FF FF
ppp_recv_config[0]
ppp: auth protocols: PAP=0 CHAP=0 CHAP_MD5=0 CHAP_MS=0 CHAP_MS2=0
pppos_write[0]: len=24
ppp_start[0]: finished
netif: setting default interface pp
tcp_bind: bind to port 80
udp_bind(ipaddr = 0.0.0.0, port = 137)
udp_bind: bound to 0.0.0.0, port 137)
SNMP private MIB start, detecting sensors.
tcpip_thread: API message 0xb51fd2d0
tcpip_thread: API message 0xb59fe2b0
tcpip_thread: API message 0xb47fe2c0
tcpip_thread: API message 0xb3ffe2d0
tcpip_thread: API message 0xb51fd2d0
tcp_bind: bind to port 23
tcpip_thread: API message 0xb59fe2b0
tcp_bind: bind to port 7
tcpip_thread: API message 0xb47fe2c0
udp_bind(ipaddr = 0.0.0.0, port = 7)
udp_bind: bound to 0.0.0.0, port 7)
tcpip_thread: API message 0xb3ffe2d0
udp_bind(ipaddr = 0.0.0.0, port = 161)
udp_bind: bound to 0.0.0.0, port 161)
tcpip_thread: API message 0xb51fd2d0
tcpip_thread: API message 0xb59fe2b0
TCP/IP initialized.
Applications started.
pppos_input[0]: got 5 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 7 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 3 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 6 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_write[0]: len=24
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 14 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 12 bytes
pppos_input[0]: got 3 bytes
pppos_input[0]: got 9 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
netif_set_mtu[0]: mtu=296
pppos_send_config[0]: out_accm=0 0 0 0
ppp_send_config[0]
pppos_recv_config[0]: in_accm=0 0 0 0
ppp_recv_config[0]
ppp phase changed[0]: phase=5
ppp phase changed[0]: phase=7
ccp_set[0]: is_open=1, is_up=0, receive_method=0, transmit_method=0
pppos_write[0]: len=20
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 8 bytes
pppos_input[0]: got 2 bytes
pppos_write[0]: len=12
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 7 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_write[0]: len=20
pppos_input[0]: got 1 bytes
pppos_input[0]: got 6 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_write[0]: len=20
pppos_input[0]: got 8 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 5 bytes
pppos_input[0]: got 1 bytes
sifvjcomp[0]: VJ compress enable=1 slot=1 max slot=15
netif: netmask of interface pp set to 255.255.255.255
netif: GW address of interface pp set to 192.168.123.20
netif_set_ipaddr: netif address being changed
netif: IP address of interface pp set to 192.168.123.21
sifup[0]: err_code=0
ppp_link_status_cb: PPPERR_NONE
   our_ip4addr = 192.168.123.21
   his_ipaddr  = 192.168.123.20
   netmask     = 255.255.255.255
local  IP address 192.168.123.21
remote IP address 192.168.123.20
ppp phase changed[0]: phase=8
pppos_input[0]: got 7 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 6 bytes
pppos_input[0]: got 4 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 12 bytes
pppos_input[0]: got 3 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 12 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 3 bytes
ppp_input[0]: ip in pbuf len=60
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        60     | (v, hl, tos, len)
+-------------------------------+
|    16632      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x8249     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 60 p->tot_len 60
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400129          | (seq no)
+-------------------------------+
|           0000000000          | (ack no)
+-------------------------------+
| 10 |   |000010|     29200     | (hdrlen, flags (SYN 
), win)
+-------------------------------+
|    0xee39     |         0     | (chksum, urgp)
+-------------------------------+
tcp_input: packed for LISTENing connection.
TCP connection request 47180 -> 7.
tcp_parseopt: MSS
tcp_parseopt: other
tcp_parseopt: other
tcp_parseopt: NOP
tcp_parseopt: other
tcp_enqueue_flags: queuelen: 0
tcp_enqueue_flags: queueing 6510:6511 (0x12)
tcp_enqueue_flags: 1 (after enqueued)
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
tcp_output_segment: rtseq 6510
tcp_output_segment: 6510:6510
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        0      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x4451     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x21, len = 44
pppos_input[0]: got 14 bytes
pppos_input[0]: got 29 bytes
pppos_input[0]: Dropping bad fcs 0xab1c proto=0x21
pppos_input_drop: pbuf len=59, addr 0x80b51e0
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, seg == NULL, ack 6510
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, seg == NULL, ack 6510
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, seg == NULL, ack 6510
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, seg == NULL, ack 6510
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1, wnd 1, seg == NULL, ack 6510
tcp_slowtmr: processing active pcb
tcp_slowtmr: rtime 6 pcb->rto 6
tcp_slowtmr: cwnd 256 ssthresh 512
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6510, ack 6510
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6510, ack 6510, i 0
tcp_output_segment: rtseq 6510
tcp_output_segment: 6510:6510
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        1      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x4450     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x21, len = 44
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, seg == NULL, ack 6510
pppos_input[0]: got 11 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 11 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 9 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
ppp_input[0]: ip in pbuf len=40
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|    16634      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x825b     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 40 p->tot_len 40
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400130          | (seq no)
+-------------------------------+
|           0000006511          | (ack no)
+-------------------------------+
|  5 |   |010000|     29200     | (hdrlen, flags (ACK 
), win)
+-------------------------------+
|    0xe27a     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: SYN_RCVD
TCP connection established 47180 -> 7.
accept_function: newpcb->tate: ESTABLISHED
tcp_receive: window update 29200
tcp_receive: slow start cwnd 512
tcp_receive: ACK for 6511, unacked->seqno 6510:6511
tcp_receive: removing 6510:6511 from pcb->unacked
tcp_receive: queuelen 1 ... 0 (after freeing unacked)
tcp_receive: pcb->rttest 6 rtseq 6510 ackno 6511
tcp_receive: experienced rtt 0 ticks (0 msec).
tcp_receive: RTO 5 (2500 milliseconds)
tcp_process (SYN_RCVD): cwnd 1024 ssthresh 29200
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, seg == NULL, ack 6511
State: ESTABLISHED
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, seg == NULL, ack 6511
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, seg == NULL, ack 6511
pppos_input[0]: got 8 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 13 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 7 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
tcp_slowtmr: processing active pcb
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
ppp_input[0]: ip in pbuf len=44
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|    16635      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x8256     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 44 p->tot_len 44
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400130          | (seq no)
+-------------------------------+
|           0000006511          | (ack no)
+-------------------------------+
|  5 |   |011000|     29200     | (hdrlen, flags (PSH ACK 
), win)
+-------------------------------+
|    0xfa94     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: pcb->rttest 0 rtseq 6510 ackno 6511
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, seg == NULL, ack 6511
State: ESTABLISHED
tcpip_thread: API message 0xb59fe290
tcp_recved: received 4 bytes, wnd 8096 (0).
netconn_recv_data: received 0x80b51e0, len=4
tcpip_thread: API message 0xb59fe2b0
tcp_write(pcb=0x80b58b4, data=0x80b522a, len=4, apiflags=1)
tcp_write: queuelen: 0
tcp_write: queueing 6511:6515
tcp_write: 1 (after enqueued)
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, effwnd 4, seq 6511, ack 6511
tcp_output: snd_wnd 29200, cwnd 1024, wnd 1024, effwnd 4, seq 6511, ack 6511, i 0
tcp_output_segment: rtseq 6511
tcp_output_segment: 6511:6515
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        2      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x444f     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x2f, len = 44
pppos_input[0]: got 11 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 10 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 6 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
ppp_input[0]: ip in pbuf len=40
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|    16636      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x8259     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 40 p->tot_len 40
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400134          | (seq no)
+-------------------------------+
|           0000006515          | (ack no)
+-------------------------------+
|  5 |   |010000|     29200     | (hdrlen, flags (ACK 
), win)
+-------------------------------+
|    0xe272     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: window update 29200
tcp_receive: slow start cwnd 1280
tcp_receive: ACK for 6515, unacked->seqno 6511:6515
tcp_receive: removing 6511:6515 from pcb->unacked
tcp_receive: queuelen 1 ... 0 (after freeing unacked)
tcp_receive: pcb->rttest 11 rtseq 6511 ackno 6515
tcp_receive: experienced rtt 0 ticks (0 msec).
tcp_receive: RTO 4 (2000 milliseconds)
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1280, wnd 1280, seg == NULL, ack 6515
State: ESTABLISHED
tcp_slowtmr: processing active pcb
pppos_input[0]: got 7 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 8 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 10 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1280, wnd 1280, seg == NULL, ack 6515
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
ppp_input[0]: ip in pbuf len=46
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
+-------------------------------+
|    16637      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x8252     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 46 p->tot_len 46
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400134          | (seq no)
+-------------------------------+
|           0000006515          | (ack no)
+-------------------------------+
|  5 |   |011000|     29200     | (hdrlen, flags (PSH ACK 
), win)
+-------------------------------+
|    0x8837     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: pcb->rttest 0 rtseq 6511 ackno 6515
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1280, wnd 1280, seg == NULL, ack 6515
State: ESTABLISHED
tcpip_thread: API message 0xb59fe290
tcp_recved: received 6 bytes, wnd 8096 (0).
netconn_recv_data: received 0x80b5270, len=6
tcpip_thread: API message 0xb59fe2b0
tcp_write(pcb=0x80b58b4, data=0x80b52ba, len=6, apiflags=1)
tcp_write: queuelen: 0
tcp_write: queueing 6515:6521
tcp_write: 1 (after enqueued)
tcp_output: snd_wnd 29200, cwnd 1280, wnd 1280, effwnd 6, seq 6515, ack 6515
tcp_output: snd_wnd 29200, cwnd 1280, wnd 1280, effwnd 6, seq 6515, ack 6515, i 0
tcp_output_segment: rtseq 6515
tcp_output_segment: 6515:6521
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
+-------------------------------+
|        3      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x444c     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x2d, len = 14
pppos_input[0]: got 12 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 15 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 4 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
ppp_input[0]: ip in pbuf len=40
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|    16638      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x8257     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 40 p->tot_len 40
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400140          | (seq no)
+-------------------------------+
|           0000006521          | (ack no)
+-------------------------------+
|  5 |   |010000|     29200     | (hdrlen, flags (ACK 
), win)
+-------------------------------+
|    0xe266     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: window update 29200
tcp_receive: slow start cwnd 1536
tcp_receive: ACK for 6521, unacked->seqno 6515:6522
tcp_receive: pcb->rttest 13 rtseq 6515 ackno 6521
tcp_receive: experienced rtt 0 ticks (0 msec).
tcp_receive: RTO 3 (1500 milliseconds)
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1536, wnd 1536, seg == NULL, ack 6521
State: ESTABLISHED
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 1536, wnd 1536, seg == NULL, ack 6521
tcp_slowtmr: processing active pcb
tcp_slowtmr: rtime 3 pcb->rto 3
tcp_slowtmr: cwnd 256 ssthresh 768
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6515, ack 6521
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6515, ack 6521, i 0
tcp_output_segment: rtseq 6515
tcp_output_segment: 6515:6521
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
+-------------------------------+
|        4      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x444b     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x21, len = 46
pppos_input[0]: got 8 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 11 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 11 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 5 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
ppp_input[0]: ip in pbuf len=50
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        50     | (v, hl, tos, len)
+-------------------------------+
|    16639      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x824c     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 50 p->tot_len 50
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400140          | (seq no)
+-------------------------------+
|           0000006521          | (ack no)
+-------------------------------+
|  5 |   |011000|     29200     | (hdrlen, flags (PSH ACK 
), win)
+-------------------------------+
|    0xce22     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: pcb->rttest 16 rtseq 6515 ackno 6521
tcp_receive: experienced rtt 0 ticks (0 msec).
tcp_receive: RTO 3 (1500 milliseconds)
tcp_output: nothing to send ((nil))
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, seg == NULL, ack 6521
State: ESTABLISHED
tcpip_thread: API message 0xb59fe290
tcp_recved: received 10 bytes, wnd 8096 (0).
netconn_recv_data: received 0x80b51e0, len=10
tcpip_thread: API message 0xb59fe2b0
tcp_write(pcb=0x80b58b4, data=0x80b522a, len=10, apiflags=1)
tcp_write: queuelen: 1
tcp_write: queueing 6521:6531
tcp_write: 2 (after enqueued)
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
tcp_fasttmr: delayed ACK
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
pppos_input[0]: got 9 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 9 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 16 bytes
pppos_input[0]: got 5 bytes
pppos_input[0]: got 1 bytes
pppos_input[0]: got 2 bytes
ppp_input[0]: ip in pbuf len=50
ip_input: iphdr->dest 0x157ba8c0 netif->ip_addr 0x157ba8c0 (0x157ba8c0, 0x157ba8c0, 0x0)
ip_input: packet accepted on interface pp
ip_input: 
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        50     | (v, hl, tos, len)
+-------------------------------+
|    16640      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x824b     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   20  | (src)
+-------------------------------+
|  192  |  168  |  123  |   21  | (dest)
+-------------------------------+
ip_input: p->len 50 p->tot_len 50
TCP header:
+-------------------------------+
|    47180      |        7      | (src port, dest port)
+-------------------------------+
|           0772400140          | (seq no)
+-------------------------------+
|           0000006521          | (ack no)
+-------------------------------+
|  5 |   |011000|     29200     | (hdrlen, flags (PSH ACK 
), win)
+-------------------------------+
|    0xce22     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK 
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: pcb->rttest 0 rtseq 6515 ackno 6521
tcp_receive: duplicate seqno 772400140
tcp_output: sending ACK for 772400150
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|        5      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x4450     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x2d, len = 9
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
State: ESTABLISHED
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: rtime 3 pcb->rto 3
tcp_slowtmr: cwnd 256 ssthresh 512
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6515, ack 6521
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 0, seq 6515, ack 6521, i 0
tcp_output_segment: rtseq 6515
tcp_output_segment: 6515:6521
ip_output_if: pp0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
+-------------------------------+
|        6      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x4449     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |  123  |   21  | (src)
+-------------------------------+
|  192  |  168  |  123  |   20  | (dest)
+-------------------------------+
netif->output()pppos_netif_output[0]: proto=0x21, len = 46
tcp_slowtmr: polling application
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_output: snd_wnd 29200, cwnd 256, wnd 256, effwnd 10, seq 6521, ack 6521
tcp_slowtmr: processing active pcb